Someone had to first use power to bring a piece of knowledge into existence. Once said person learns said knowledge of a subject, then it can be used. An example would be the atom bomb. Which obviously is extremely powerful. Of coarse, we have game shows which reward knowledge.

Electricity(a form of power) is first used in the bodies process of doing anything.

So id have to say, power is knowledge, and then knowledge is power. Amongst many other things.